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Johnson Controls BACnet TEC26 7VVT-2 Series Installation Instructions Manual
Johnson Controls BACnet TEC26 7VVT-2 Series Installation Instructions Manual

Johnson Controls BACnet TEC26 7VVT-2 Series Installation Instructions Manual

Ms/tp networked thermostats with two outputs for vvt systems

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TEC26x7VVT-2 Series BACnet® MS/TP Networked
Thermostats with Two Outputs for VVT Systems
Installation Instructions
Applications
The TEC26x7VVT-2 Series Thermostats are BACnet®
MS/TP networked devices that provide control of
pressure dependent Variable Air Volume (VAV)
equipment with or without local reheat, or other zoning
equipment using a floating or proportional 0 to 10 VDC
control input for Variable Air Volume and Temperature
(VVT) systems. The technologically advanced
TEC26x7VVT-2 Series Thermostats feature a Building
Automation
System (BAS) BACnet MS/TP communication
capability that enables remote monitoring and
programmability for efficient space temperature control.
The TEC26x7VVT-2 Series Thermostats feature an
intuitive user interface with backlit display that makes
setup and operation quick and easy. The thermostats
also employ a unique, Proportional-Integral (PI)
time-proportioning algorithm that virtually eliminates
temperature offset associated with traditional,
differential-based thermostats.
IMPORTANT: The TEC26x7VVT-2 Series
Thermostats are intended to provide an input to
equipment under normal operating conditions.
Where failure or malfunction of the thermostat could
lead to personal injury or property damage to the
controlled equipment or other property, additional
precautions must be designed into the control
system. Incorporate and maintain other devices
such as supervisory or alarm systems or safety or
limit controls intended to warn of, or protect against,
failure or malfunction of the thermostat.
TEC26x7VVT-2 Series BACnet® MS/TP Networked Thermostats with Two
Part No. 24-9890-633, Rev. —
North American Emissions Compliance
United States
This equipment has been tested and found to comply
with the limits for a Class A digital device pursuant to
Part 15 of the FCC Rules. These limits are designed to
provide reasonable protection against harmful
interference when this equipment is operated in a
commercial environment. This equipment generates,
uses, and can radiate radio frequency energy and, if
not installed and used in accordance with the
instruction manual, may cause harmful interference to
radio communications. Operation of this equipment in a
residential area is likely to cause harmful interference,
in which case the user will be required to correct the
interference at his/her own expense.
Canada
This Class (A) digital apparatus meets all the
requirements of the Canadian Interference-Causing
Equipment Regulations.
Cet appareil numérique de la Classe (A) respecte
toutes les exigences du Règlement sur le matériel
brouilleur du Canada.
Installation
Location Considerations
Locate the TEC26x7VVT-2 Series Thermostat:
on a partitioning wall, approximately 5 ft (1.5 m)
above the floor in a location of average
temperature
away from direct sunlight, radiant heat, outside
walls, behind doors, air discharge grills, stairwells,
or outside doors
away from steam or water pipes, warm air stacks,
unconditioned areas (not heated or cooled), or
sources of electrical interference
Note: Allow for vertical air circulation to the
TEC26x7VVT-2 Series Thermostat.
Outputs for VVT Systems Installation Instructions
Issued November 8, 2006
1

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Summary of Contents for Johnson Controls BACnet TEC26 7VVT-2 Series

  • Page 1 TEC26x7VVT-2 Series BACnet® MS/TP Networked Thermostats with Two Outputs for VVT Systems Part No. 24-9890-633, Rev. — Installation Instructions Issued November 8, 2006 Applications North American Emissions Compliance The TEC26x7VVT-2 Series Thermostats are BACnet® United States MS/TP networked devices that provide control of This equipment has been tested and found to comply pressure dependent Variable Air Volume (VAV) with the limits for a Class A digital device pursuant to...
  • Page 2 To install the thermostat: 6. Drill a 3/16 in. (5 mm) hole at each of the two marked locations and tap nylon anchors (included 1. Use a Phillips-head screwdriver to remove the with the thermostat) flush to the wall surface. security screw on the bottom of the thermostat 7.
  • Page 3 Wiring To wire the thermostat: When an existing thermostat is replaced, remove and 1. Strip the ends of each wire 1/4 in. (6 mm) and label the wires to identify the terminal functions. When connect them to the appropriate screw terminals as a TEC26x7VVT-2 Series Thermostat is replaced, indicated in Table 1 and Figure 5 through simply remove the old screw terminal blocks and...
  • Page 4 Separate 24 VAC Power Source for Auxiliary Output (24 VAC Maximum) Two-Pole 24 V~ 24 V~ Left Top Three-Pole Connector Right Top Connector 24 V~ 24 V~ – Eight-Pole Bottom Connector 24 VAC BO4/ BO1/ Thermostat Power Scom Independent Contacts •...
  • Page 5 Floating Actuator UI3 COS 24 V~ Com Room Temperature Control Thermostat 24 V~ Hot (Minimum and Maximum Position BO1 Open Adjusted on Actuator) BO2 Close Figure 6: Wiring the TEC2627VVT-2 Thermostat for Floating Control (Pressure-Dependent VAV Cooling Only) Proportional 0 to 10 Actuator UI3 COS 24 V~ Com...
  • Page 6 Changeover Supply Air Sensor Temperature Sensor Proportional Actuator 0 to 10 UI3 COS 24 V~ Com 24 V~ Hot Room Temperature Control Thermostat (Minimum and Maximum Position Adjusted on Actuator) Figure 9: Wiring the TEC2647VVT-2 Thermostat for Proportional 0 to 10 VDC Control (Pressure-Dependent VAV Heating/Cooling with Changeover) Supply Air Heating/Cooling...
  • Page 7 Table 2: MS/TP Bus Objects (Part 1 of 4) Point Name Thermostat Point Range (Type/Address) 1, 2 AV 6 -40.0°F/-40.0°C to Room Temp 122.0°F/50.0°F BV 7 0 = Normal Room Temp Override 1 = Override 3, 4 AV 8 -40.0°F/-40.0°C to Outdoor Temperature 122.0°F/50.0°F MSV 39...
  • Page 8 Table 2: MS/TP Bus Objects (Part 2 of 4) Point Name Thermostat Point Range (Type/Address) BI 59 0 = Off Filter Alarm 1 = On BI 60 0 = Off Service Alarm 1 = On AV 49 40.0°F/4.5°C to 3, 7 Occupied Heat Setpoint 90.0°F/32.0°C 3, 7...
  • Page 9 Table 2: MS/TP Bus Objects (Part 3 of 4) Point Name Thermostat Point Range (Type/Address) MSV 30 1 = 0 Hours Temporary Occupancy Time 2 = 1 Hour 3 = 2 Hours 4 = 3 Hours 5 = 4 Hours 6 = 5 Hours 7 = 6 Hours 8 = 7 Hours...
  • Page 10 Table 2: MS/TP Bus Objects (Part 4 of 4) Point Name Thermostat Point Range (Type/Address) On/Off Control CPH (TEC2627VVT-2 MSV 37 1 = 3 CPH 2 = 4 CPH Model) 3 = 5 CPH 4 = 6 CPH 5 = 7 CPH 6 = 8 CPH Direct/Reverse Acting (TEC2647VVT-2 BV 38...
  • Page 11 A small green light under the thermostat cover (on the Adding a Thermostat left edge when facing the thermostat) indicates the The thermostat must be added before its points can be communications mode when the thermostat is mapped. To do this, select the BACnet Integration operating.
  • Page 12 Overriding via the NAE All network overrides are released automatically after 10 minutes of no communication to any other device The last override command to any point object is used (for example, if the network cable is removed from the or saved.
  • Page 13 Status Display Menu Configuring Inputs BI1, BI2, and UI3 The Status Display Menu is displayed during normal When BI1 and BI2 are configured for an alarm thermostat operation. This menu continuously scrolls condition, an alarm condition is displayed locally when through the following parameters: the input is closed.
  • Page 14 Table 4: Selection Options for Sequence of Operation in Four-Pipe Applications Selection Control Terminal Numbers Used (See Table 1 and Figure 5.) Option Curve On/Off Control Floating Control Proportional 0 to 10 VDC Control (0): Cooling Only See Figure 13. 10: N.O.
  • Page 15 On/Off, Floating, Heating Output or Proportional Outputs Cooling Output Reheat Heating Setpoint Cooling Setpoint 100% Deadband Device Opened On/Off, Floating, Device or Proportional Closed Output Temperature Increase (Increments of 1F°/0.5C°) Temperature Increase Figure 17: Heating/Cooling, (Increments of 1F°/0.5C°) Four-Pipe Applications Figure 16: Heating with Reheat, Two- or Four-Pipe Applications On/Off, Floating,...
  • Page 16 Table 5: Installer Configuration Menu (Part 1 of 4) Parameter Description and Default Selection Options Appearing on Display Com addr MS/TP address at the thermostat; Range: 004 to 127 coincides with the address assigned at the supervisory controller. Default: 127 Configuration of Binary Input 1.
  • Page 17 Table 5: Installer Configuration Menu (Part 2 of 4) Parameter Description and Default Selection Options Appearing on Display Configuration of Universal Input 3. (None): No function is associated with an input. Default: None (COC/NH): Changeover Contact/Normally Heat: A dry contact input is used to signal seasonal hot/cold water changeover.
  • Page 18 Table 5: Installer Configuration Menu (Part 3 of 4) Parameter Description and Default Selection Options Appearing on Display SeqOpera Determines the sequence of (0): Cooling Only (Off-Cool). The default is Cool. operation. (1): Heating Only (Off-Heat). The default is Heat. Default: 2 (2): Cooling and Reheat (Off-Auto-Heat-Cool).
  • Page 19 Table 5: Installer Configuration Menu (Part 4 of 4) Parameter Description and Default Selection Options Appearing on Display Cal RS Sets the desired room air sensor Range: -5.0F°/-2.5C° to 5.0F°/2.5C° (adjustable in 1.0F°/0.5C° calibration (offset). The offset can increments) be added to or subtracted from the actual displayed room temperature.
  • Page 20 Strap-Mount Temperature Sensor MS-BACEOL-0 RS485 End-of-Line Terminator Additional TE-636xx-x Series 10k ohm Johnson Controls Type II Thermistor Sensors are available; refer to the TE-6300 Series Temperature Sensors Product Bulletin (LIT-216320) for more details. Table 7: Troubleshooting Details (Part 1 of 2)
  • Page 21 Table 7: Troubleshooting Details (Part 2 of 2) Symptom Probable Causes Thermostat Does See the probable causes listed in the Multiple Symptoms section earlier in this table. Not Come Online A thermostat may be connected to the wrong bus. A baud rate may be specified in the new thermostat that is incompatible with the running network. No device on the network is configured to use a specific baud rate (normally the NAE), but all devices are set to use auto baud.
  • Page 22 The performance specifications are nominal and conform to acceptable industry standards. For application at conditions beyond these specifications, consult the local Johnson Controls office. Johnson Controls, Inc. shall not be liable for damages resulting from misapplication or misuse of its products.

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